/* Material Design 3 - MSME Credit Scoring System */

/* Import Google Fonts - Material Design Typography */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=Roboto+Mono:wght@400;500&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons');

/* Material Design 3 Color System */
:root {
    /* Primary Colors - Custom Green Theme */
    --md-sys-color-primary: #136D5D;
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: rgba(19, 109, 93, 0.12);
    --md-sys-color-on-primary-container: #136D5D;
    
    /* Secondary Colors */
    --md-sys-color-secondary: rgba(19, 109, 93, 0.8);
    --md-sys-color-on-secondary: #ffffff;
    --md-sys-color-secondary-container: rgba(19, 109, 93, 0.15);
    --md-sys-color-on-secondary-container: #136D5D;
    
    /* Surface Colors */
    --md-sys-color-surface: #ffffff;
    --md-sys-color-on-surface: #1c1b1f;
    --md-sys-color-surface-variant: rgba(19, 109, 93, 0.05);
    --md-sys-color-on-surface-variant: #49454f;
    --md-sys-color-surface-container: rgba(255, 255, 255, 0.95);
    --md-sys-color-surface-container-high: rgba(255, 255, 255, 0.98);
    --md-sys-color-surface-container-highest: #ffffff;
    
    /* Background */
    --md-sys-color-background: #ffffff;
    --md-sys-color-on-background: #1c1b1f;
    
    /* Error Colors */
    --md-sys-color-error: #ba1a1a;
    --md-sys-color-on-error: #ffffff;
    --md-sys-color-error-container: #ffdad6;
    --md-sys-color-on-error-container: #410002;
    
    /* Success Colors */
    --md-sys-color-success: #136D5D;
    --md-sys-color-on-success: #ffffff;
    --md-sys-color-success-container: rgba(19, 109, 93, 0.12);
    --md-sys-color-on-success-container: #136D5D;
    
    /* Warning Colors */
    --md-sys-color-warning: rgba(19, 109, 93, 0.7);
    --md-sys-color-on-warning: #ffffff;
    --md-sys-color-warning-container: rgba(19, 109, 93, 0.08);
    --md-sys-color-on-warning-container: #136D5D;
    
    /* Tertiary Colors */
    --md-sys-color-tertiary: rgba(19, 109, 93, 0.6);
    --md-sys-color-on-tertiary: #ffffff;
    --md-sys-color-tertiary-container: rgba(19, 109, 93, 0.1);
    --md-sys-color-on-tertiary-container: #136D5D;
    
    /* Outline */
    --md-sys-color-outline: rgba(19, 109, 93, 0.3);
    --md-sys-color-outline-variant: rgba(19, 109, 93, 0.1);
    
    /* Shadows */
    --md-elevation-1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
    --md-elevation-2: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
    --md-elevation-3: 0px 1px 3px 0px rgba(0, 0, 0, 0.3), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);
    --md-elevation-4: 0px 2px 3px 0px rgba(0, 0, 0, 0.3), 0px 6px 10px 4px rgba(0, 0, 0, 0.15);
    --md-elevation-5: 0px 4px 4px 0px rgba(0, 0, 0, 0.3), 0px 8px 12px 6px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --md-sys-shape-corner-none: 0px;
    --md-sys-shape-corner-extra-small: 4px;
    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 12px;
    --md-sys-shape-corner-large: 16px;
    --md-sys-shape-corner-extra-large: 28px;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--md-sys-color-on-background);
    background: linear-gradient(135deg, #136D5D 0%, rgba(19, 109, 93, 0.8) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Material Design Typography */
.md-headline-large {
    font-size: 32px;
    line-height: 40px;
    font-weight: 400;
    letter-spacing: 0px;
}

.md-headline-medium {
    font-size: 28px;
    line-height: 36px;
    font-weight: 400;
    letter-spacing: 0px;
}

.md-headline-small {
    font-size: 24px;
    line-height: 32px;
    font-weight: 400;
    letter-spacing: 0px;
}

.md-title-large {
    font-size: 22px;
    line-height: 28px;
    font-weight: 400;
    letter-spacing: 0px;
}

.md-title-medium {
    font-size: 16px;
    line-height: 24px;
    font-weight: 500;
    letter-spacing: 0.15px;
}

.md-body-large {
    font-size: 16px;
    line-height: 24px;
    font-weight: 400;
    letter-spacing: 0.5px;
}

.md-body-medium {
    font-size: 14px;
    line-height: 20px;
    font-weight: 400;
    letter-spacing: 0.25px;
}

.md-label-large {
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
    letter-spacing: 0.1px;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* Material Header */
.header {
    background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, var(--md-sys-color-secondary) 100%);
    color: var(--md-sys-color-on-primary);
    padding: 64px 0 80px;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05" fill-rule="nonzero"><circle cx="30" cy="30" r="2"/></g></g></svg>') repeat;
}

.header .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.header h1 {
    font-size: 48px;
    font-weight: 300;
    line-height: 56px;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.header p {
    font-size: 18px;
    font-weight: 400;
    line-height: 28px;
    opacity: 0.87;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Material Navigation */
.navigation-links {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--md-sys-shape-corner-large);
    color: var(--md-sys-color-on-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    backdrop-filter: blur(8px);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: rgba(255, 255, 255, 0.24);
    box-shadow: var(--md-elevation-1);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.24);
    border-color: rgba(255, 255, 255, 0.32);
}

/* Material Cards */
.card {
    background: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-large);
    box-shadow: var(--md-elevation-1);
    margin-bottom: 24px;
    overflow: hidden;
    transition: box-shadow 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.card:hover {
    box-shadow: var(--md-elevation-2);
}

.card-header {
    padding: 24px 24px 16px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.card-title {
    color: var(--md-sys-color-on-surface);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.card-subtitle {
    color: var(--md-sys-color-on-surface-variant);
}

.card-content {
    padding: 24px;
}

/* Material Buttons */
.md-filled-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border: none;
    border-radius: var(--md-sys-shape-corner-large);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    letter-spacing: 0.1px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: var(--md-elevation-1);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.md-filled-button:hover {
    box-shadow: var(--md-elevation-2);
}

.md-filled-button:active {
    box-shadow: var(--md-elevation-1);
}

.md-outlined-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: transparent;
    color: var(--md-sys-color-primary);
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-large);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    letter-spacing: 0.1px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    text-decoration: none;
}

.md-outlined-button:hover {
    background: var(--md-sys-color-primary-container);
}

/* Material Form Elements */
.upload-form {
    text-align: center;
    padding: 48px 24px;
    border: 2px dashed var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-large);
    background: var(--md-sys-color-surface-container);
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    position: relative;
}

.upload-form:hover {
    border-color: var(--md-sys-color-primary);
    background: var(--md-sys-color-primary-container);
}

.upload-form.drag-over {
    border-color: var(--md-sys-color-primary);
    background: var(--md-sys-color-primary-container);
    transform: scale(1.01);
    box-shadow: var(--md-elevation-2);
}

.upload-form h3 {
    color: var(--md-sys-color-on-surface);
    margin-bottom: 8px;
}

.upload-form p {
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 24px;
}

.file-input-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: 16px;
}

.file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.file-input-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border-radius: var(--md-sys-shape-corner-large);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: var(--md-elevation-1);
}

.file-input-label:hover {
    box-shadow: var(--md-elevation-2);
}

/* Material Alerts */
.md-alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border-radius: var(--md-sys-shape-corner-medium);
    margin: 16px 0;
}

.md-alert-info {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
}

.md-alert-success {
    background: var(--md-sys-color-success-container);
    color: var(--md-sys-color-on-success-container);
}

.md-alert-warning {
    background: var(--md-sys-color-warning-container);
    color: var(--md-sys-color-on-warning-container);
}

.md-alert-error {
    background: var(--md-sys-color-error-container);
    color: var(--md-sys-color-on-error-container);
}

/* Loading States */
.loading {
    text-align: center;
    padding: 48px 24px;
    color: var(--md-sys-color-on-surface-variant);
}

.loading h3 {
    color: var(--md-sys-color-on-surface);
    margin-bottom: 8px;
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.summary-card {
    background: linear-gradient(135deg, var(--md-sys-color-surface-container-high) 0%, rgba(255,255,255,0.95) 100%);
    padding: 2rem 1.5rem;
    border-radius: var(--md-sys-shape-corner-large);
    border-left: 5px solid var(--md-sys-color-primary);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: var(--md-elevation-2);
    position: relative;
    overflow: hidden;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
}

.summary-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--md-elevation-4);
    border-left-color: var(--md-sys-color-secondary);
}

.summary-card h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--md-sys-color-primary);
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.summary-card h4 {
    color: var(--md-sys-color-on-surface);
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 1.1rem;
}

.summary-card p {
    color: var(--md-sys-color-on-surface-variant);
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
}

/* Requirements Section */
.requirements {
    background: var(--md-sys-color-surface-container);
    padding: 24px;
    border-radius: var(--md-sys-shape-corner-medium);
    border: 1px solid var(--md-sys-color-outline-variant);
    margin: 24px 0;
}

.requirements h4 {
    color: var(--md-sys-color-on-surface);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.requirements ul {
    list-style: none;
}

.requirements li {
    padding: 8px 0;
    color: var(--md-sys-color-on-surface-variant);
    position: relative;
    padding-left: 24px;
    line-height: 20px;
}

.requirements li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--md-sys-color-success);
    font-weight: 500;
}

/* Code Blocks */
code {
    font-family: 'Roboto Mono', monospace;
    font-size: 12px;
    background: var(--md-sys-color-surface-container-highest);
    padding: 4px 8px;
    border-radius: var(--md-sys-shape-corner-extra-small);
    color: var(--md-sys-color-on-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
}

details {
    margin: 16px 0;
}

details summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--md-sys-color-primary);
    padding: 8px 0;
    list-style: none;
}

details summary::-webkit-details-marker {
    display: none;
}

details summary::before {
    content: '▶';
    display: inline-block;
    margin-right: 8px;
    transition: transform 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
}

details[open] summary::before {
    transform: rotate(90deg);
}

/* Animations */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(24px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes slideUp {
    from { 
        transform: translateY(16px); 
        opacity: 0; 
    }
    to { 
        transform: translateY(0); 
        opacity: 1; 
    }
}

@keyframes progressBar {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

.fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.slide-up {
    animation: slideUp 0.3s cubic-bezier(0.4, 0.0, 0.2, 1) 0.1s both;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header {
        padding: 48px 0 64px;
    }
    
    .header h1 {
        font-size: 32px;
        line-height: 40px;
    }
    
    .header p {
        font-size: 16px;
        line-height: 24px;
    }
    
    .navigation-links {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }
    
    .nav-link {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .card-header, .card-content {
        padding: 16px;
    }
    
    .upload-form {
        padding: 32px 16px;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 32px 0 48px;
    }
    
    .header h1 {
        font-size: 28px;
        line-height: 36px;
    }
    
    .card-header, .card-content {
        padding: 12px;
    }
    
    .upload-form {
        padding: 24px 12px;
    }
}

/* Accessibility */
.file-input:focus + .file-input-label,
.md-filled-button:focus,
.md-outlined-button:focus,
.nav-link:focus {
    outline: 2px solid var(--md-sys-color-primary);
    outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid var(--md-sys-color-outline);
    }
    
    .md-filled-button {
        border: 2px solid var(--md-sys-color-primary);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Enhanced Results Table Styling */
.results-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-medium);
    overflow: hidden;
    box-shadow: var(--md-elevation-1);
}

.results-table th {
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    color: var(--md-sys-color-on-primary);
    font-weight: 600;
    text-align: left;
    padding: 1rem 1.5rem;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.results-table td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    transition: background-color 0.2s ease;
}

.results-table tr:hover td {
    background: var(--md-sys-color-surface-variant);
}

.results-table tr:last-child td {
    border-bottom: none;
}

/* Credit Score Badge */
.credit-score-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--md-sys-shape-corner-large);
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--md-elevation-1);
}

.credit-score-excellent {
    background: linear-gradient(135deg, #136D5D, #0f5a4d);
    color: white;
}

.credit-score-good {
    background: linear-gradient(135deg, #4caf50, #45a049);
    color: white;
}

.credit-score-fair {
    background: linear-gradient(135deg, #ff9800, #f57c00);
    color: white;
}

.credit-score-poor {
    background: linear-gradient(135deg, #f44336, #d32f2f);
    color: white;
}

/* Feature Importance Styling */
.feature-importance-container {
    margin: 2rem 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    margin-bottom: 0.75rem;
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-medium);
    border-left: 4px solid var(--md-sys-color-primary);
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: var(--md-sys-color-surface-container-high);
    transform: translateX(4px);
    box-shadow: var(--md-elevation-2);
}

.feature-name {
    flex: 1;
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-name i {
    color: var(--md-sys-color-primary);
    width: 20px;
    text-align: center;
}

.feature-bar {
    flex: 2;
    height: 8px;
    background: var(--md-sys-color-outline-variant);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.feature-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    border-radius: 4px;
    transition: width 0.8s ease;
}

.feature-score {
    min-width: 60px;
    text-align: right;
    font-weight: 600;
    color: var(--md-sys-color-primary);
    font-family: 'Roboto Mono', monospace;
}

/* Enhanced Alert Styling */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 1.5rem;
    border-radius: var(--md-sys-shape-corner-large);
    margin: 1.5rem 0;
    border-left: 4px solid;
    box-shadow: var(--md-elevation-1);
}

.alert-info {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border-left-color: var(--md-sys-color-primary);
}

.alert strong {
    font-weight: 600;
}

/* Visualization Grid */
.visualization-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.plot-container {
    background: var(--md-sys-color-surface-container);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--md-elevation-2);
    transition: all 0.3s ease;
}

.plot-container:hover {
    transform: translateY(-2px);
    box-shadow: var(--md-elevation-3);
}

.plot-container h4 {
    color: var(--md-sys-color-on-surface);
    margin-bottom: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.plot-container img {
    max-width: 100%;
    height: auto;
    border-radius: var(--md-sys-shape-corner-medium);
    box-shadow: var(--md-elevation-1);
}

.plot-container p {
    color: var(--md-sys-color-on-surface-variant);
    font-size: 0.875rem;
    line-height: 1.4;
    margin-top: 1rem;
}

/* Enhanced Button Styling */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--md-sys-shape-corner-large);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: var(--md-elevation-2);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    color: var(--md-sys-color-on-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--md-elevation-4);
}